Git commits in Moodle 2.1.5 by David Mudrak

commit 01af07849ea6f2001fe7090cf4428db9db5f15b8
Author: David Mudrak <david@moodle.com>
Date:   Thu, 01 Mar 2012 08:56:53 +0800
Tag:    v2.1.5

MDL-31832 CLI upgrade checks if the upgrade is actually needed

commit a158c5c3253494b9c216dbec1f0e5e734b790f05
Author: David Mudrak <david@moodle.com>
Date:   Tue, 21 Feb 2012 18:12:00 +0800
Tag:    v2.1.5

MDL-29256 Fixed incorrect calculation of contentformat

commit c1f9cde6277379eedf5e3228460469542964dbf4
Author: David Mudrak <david@moodle.com>
Date:   Thu, 26 Jan 2012 21:09:04 +0800
Tag:    v2.1.5

MDL-31317 original_site_identifier_hash falls back to null during the backup conversion

commit f711613aa5ab5fd1e0e03188afaaeca7ee858ba5
Author: David Mudrak <david@moodle.com>
Date:   Tue, 03 Jan 2012 18:29:10 +0800
Tag:    v2.1.5

MDL-30966 print_object() output made CLI-friendly